Borosilicate Glass Tubes Set (6 Colored + 2 Brushes), 3.9in - High Temp Resistant for Industrial & Craft Use

Borosilicate Glass Tubes Set: All-in-One Solution for Lab, Industrial & Craft Needs​ Tired of mixing up transparent glass tubes or searching for cleaning tools separately? This set solves both pain points with 6 distinct colored tubes and 2 matching cleaning brushes—designed for efficiency and convenience.​ The 6 colored borosilicate tubes eliminate the hassle of labeling: use different colors for specific reagents in chemistry labs, or create vibrant color combinations directly in glass-blowing crafts. No more confusion between multiple transparent tubes.​ Each tube is crafted from laboratory-grade borosilicate glass, tested for thermal stability to handle extreme temperature fluctuations without cracking. The 2mm thickened wall adds strength, making them durable enough for daily industrial use and frequent laboratory operations.​ With precise dimensions (3.9in length, 7mm ID, 12mm OD), the tubes fit standard lab equipment and craft tools seamlessly—whether you’re assembling a condensation setup or working on a glass art project. The included cleaning brushes reach deep into the tubes, ensuring thorough cleaning between uses.​ This all-in-one set combines functional design, durability, and convenience. It’s not just glass tubes—it’s a time-saving solution for professionals and hobbyists alike.

• 6 Colored Tubes + 2 Cleaning Brushes：Comes with 6 distinct colored borosilicate tubes for easy purpose differentiation (e.g., lab reagents, craft media) and 2 dedicated cleaning brushes. No need for extra tool purchases
• Laboratory-Grade Borosilicate Glass：Made of high-purity borosilicate glass with excellent thermal shock resistance. It withstands temperatures above 500℃ and resists cracking from sudden temperature changes
• 2mm Thickened Wall Design：Features a 2mm wall thickness for enhanced durability, reducing breakage risk during handling. Suitable for demanding industrial and laboratory environments
• Precise Dimension Control：Each tube measures 3.9in (100mm) in length, with 7mm inner diameter and 12mm outer diameter. Uniform walls and smooth inner bore ensure stable performance
• Easy Maintenance & Classification：Colored tubes simplify organization. Open ends and included brushes allow quick cleaning with isopropyl alcohol, and the glass surface minimizes residue adhesion